Edelbrock ProFlo 2 EFI help

This is for a friend of mine with a 496 BBC in a '92 454SS. He has retained the 4L80E and original PCM to run the trans , he has piggybacked TPS , CTS , and MAP and the trans shifts fine .

The problem we are having is Edelbrock had him modify a large cap HEI with a hall effect sensor to trigger their EFI so the original distributor and 4 pin plug that once sent a siginal to the PCM for engine rpm is gone . As you can probably figure the trans will shift but the convertor will not lock up due to a lack of an engine RPM siginal to the original PCM.

Would anyone here have a clue as to what siginal on which of the original 4 pin distributor plug we would need to aquire and where it might come from on the Edelbrock modified distributor so the convertor may lock up properly .

Here : http://www.edelbrock.com/automotive_...3000/35510.pdf are the instructions for the system , on page 21 it shows the distributor conversion

Any more info needed , please ask.

Thanks

TOM

I'd ask tech support so you don't do something to void warrenty?

Usually when using a hall effect sensor it is to trigger GM EST which is wired into ECM as stock.

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Originally Posted by EagleMark

I'd ask tech support so you don't do something to void warrenty?

Usually when using a hall effect sensor it is to trigger GM EST which is wired into ECM as stock.

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Only problem with asking Edelbrock is since Doug Stalter (ECTune on some of the boards) left , help is basically non existant...

There has to be a way to provide an rpm siginal to the factory PCM , I just have not figured it out.

TOM